ignoring file [path] missing required architecture i386 in file

Question

I'm quite new to Xcode and Iphone development and ran into the following problem: I opened a new project and added *.h and a *.a files (which I recived from a certain device vendor). I get the following warning: ld: warning: ignoring file /Users/udi/Desktop/Xcode/Xcode Projects/Scosche/libmyTrekSDK_armv7.a, missing required architecture i386 in file /Users/udi/Desktop/Xcode/Xcode Projects/Scosche/libmyTrekSDK_armv7.a (2 slices) If I ignore the warning, and try to instanciate the class that is given to me in the header file, I get these errors: ld: warning: ignoring file [Path/FileName.a], missing required architecture i386 in file [Path/FileName.a] (2 slices) Undefined symbols for architecture i386: "_OBJC_CLASS_$_HRMonitor", referenced from: objc-class-ref in ViewController.o ld: symbol(s) not found for architecture i386 clang: error: linker command failed with exit code 1 (use -v to see invocation) I've checked the Framework Search Pathes (as mantioned in many other posts) and it cl…

Accepted Answer

This warning means that you're trying to use library made for Device (ARM) with your Simulator (i386).

You can use this terminal command to create a universal library:

```
lipo -create lib_arm.a lib_i386.a -output lib_universal.a
```

More info about lipo command here.

ignoring file [path] missing required architecture i386 in file

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